If one speaker emits a wave crest at the same time that another one emits a wave trough,these speakers are π/2 out of phase with each other.

Name: If one speaker emits a wave crest at the same time that another one emits a wave trough,these speakers are π/2 out of phase with each other.
Brand: Quizplus
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Question

Quizplus · Accepted Answer

When one speaker emits a wave crest and the other emits a wave trough, they are π (or 180 degrees) out of phase, not π/2 (or 90 degrees).

If One Speaker Emits a Wave Crest at the Same